Steam boiler furnace



( No Model.) 2 Sheets.'Sheet 1. T YORK STEAM BOILER FURNACE.

Patented Feb. 12, 1895.

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T. YORK. STEAM BOILER FURNACE.

V N-0.'34,026. Patented Feb. 12, 1895.

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THOMAS YORK, OF PORTSMOUTH, OHIO.

STEAM-BOILER FURNACE.

SPECIFICATION forming part of Letters Patent No. 534,026, dated February12, 1 895.

Application filed August 20, 1894:.

To all whom it may concern.-

Be it known that I, THOMAS YORK, a citizen of the United States,residing at Portsmouth, in the county of- Scioto and State of Ohio, haveinvented certain new and useful Improvements in Steam-Boiler Furnaces;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to furnaces for stationary boilers and itconsists in a particular construction, adapted to a quick and completecombustion of the fuel by means of an alternating draft as hereinafterexplained.

In the accompanying drawings, wherein like letters represent the sameparts, Figure 1 is an upright, lengthwise section through the furnaceand boiler; Fig. 2, an upright, cross section through the same; Fig. 3,a front elevation thereof. Fig. 4, is a top plan of the furnace, andFig. 5, an elevation of the rear of the furnace.

A is the boiler; B, the four walled casing inclosing said boiler, madeand kept substantially air tight; 0, the grate, seated in the ordinarymanner within the furnace compart ment.

D represents doors in the front wall of the casing,.below the gratelevel, tightly closing the draft chambers formed by the mode ofconstruction beneath the grate; E, other tight doors in the front of thecasing, above the grate level, for the admission of fuel and for stokingthe fires, to be kept closed when not in use for those purposes, and Fis the funnel, connecting with the draft tubes of the boiler and withthe furnace compartment.

G is a long, low wall, dividing the grate into two lengthwise sections;this wall reaching from the front of the furnace to the tight crosswisewall, H, formed at the back thereof; said wall G in height extendingfrom the floor of the furnace compartment to a substantial distanceabove the grate level, but leaving a space between the summit of thewall and the boiler. v

I represents apertures formed in the back wall of the furnace, one oneach side of the grate partition wall.

K is a slide rod, fitted in, and projecting from one side of the boilercasing, and having Serial No. 520,841. No model.)

fixed to it two pendent leaf valves, 10, so arranged with relation toeach other, and to the apertures I, that when one valve, by means ofrecesses, h, in the back wall of the furnaces is keeping either of thetwo said apertures closed, the other aperture is open.

In the operation of the furnace, if the left hand door D be open, theother door D, and also the left hand aperture I should be closed. Thedraft Will then enter through the open door and blow the fire on theleft hand section of the grate C from the bottom; the heated current ofair thence passing over the wall G and blowing the fire on the righthand section of the grate from the top, and thence making its waythrough the open right hand aperture I along the boiler to the back wallof the casing B, whence it will pass into the draft tubes a formed inthe boiler, and so into and out of the funnel, F, which is to be made ashigh as needed for the creation of a good draft of air through draftchamber, grate, boiler casing, tubes and funnel. When the fire on theleft hand grate section has been well blown through the bottom and thefire on the. right hand grate section well blown through the top, theleft hand door D and the right hand aperture I should be closed, and theright hand door D and left hand aperture I opened, which reversal ofproceedings will cause the fire on the right hand grate section to beblown from the bottom and the fire on the other section to be blown fromthe top, and by continuing to alternate the described operations thefuel supplied to the furnace will be quickly and completely consumed,causing steam in the boiler to be rapidly made and the supply thereofefficiently maintained.

I claim as follows:

1. The combination in a steam boiler furnace of the boiler provided withthe draft tubes through the length thereof; the air tight casinginclosing said boiler; the tight, crosswise wall at the rear of thefurnace; the grate, suitably seated within the furnace compartment; thelong, low wall extending centrally, through the grate, from front torear of the furnace compartment and reaching from the floor thereof to aplane above the grate level; the tight doors below the grate level inthe front wall of the casing; the tight doors in said wall above thegrate level; the funnel connecting with the draft tubes of the boilerand with the furnace compartment; the apertures in the rear crosswisewall, and the slide rod, fitted with the leaf valves moving in recessesformed in the aforesaid rear wall; the whole substantially as and forthe purposes described.

2. The combination in a steam boiler furnace of the herein describedboiler casing; the grate, seated in the walls thereof; the tightcrosswise wall behind said grate, having the described apertures in saidwall; the wall, reaching from the floor of the casing to a plane abovethe grate level and extending centrally through the grate to the rearWall aforesaid; the pair of tight doors in the front Wall of the casingbelow the grate level, and the slide rod having the pair of leaf valvesmoving in recesses formed in the aforesaid rear wall and correspondingto the apertures in said wall; all substantially as set forth, for thepurpose of enabling an air current to pass upward through one section ofthe wall-divided grate and downward through the other, and thence alongthe boiler casing and of alternating said current, as herein fullydescribed.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS YORK.

\Vitnesses:

HARRY DISIELRATH, J OHN MCCONNELL.

